.page-about {
  --about-axis: 96px;
  background: var(--c-deep);
  color: var(--t-main);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + 52px) 0 clamp(48px, 7vw, 96px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(58% 52% at 84% 18%, rgba(229, 36, 126, 0.18), transparent 66%),
    radial-gradient(48% 48% at 6% 84%, rgba(62, 123, 250, 0.12), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero__frame {
  position: absolute;
  inset: calc(var(--header-h) + 20px) clamp(12px, 3vw, 36px) clamp(20px, 4vw, 40px);
  border: 1px solid var(--line);
  pointer-events: none;
}

.page-about .about-hero__frame::before,
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  width: 46px;
  height: 46px;
  border: 2px solid var(--c-gold);
}

.page-about .about-hero__frame::before {
  top: -2px;
  left: -2px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .about-hero__frame::after {
  right: -2px;
  bottom: -2px;
  border-top: 0;
  border-left: 0;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 18px;
}

.page-about .about-hero h1 {
  margin: 6px 0 0;
  max-width: 17ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 6.4vw, 78px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--c-cream);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.85;
  color: var(--t-main);
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 18px clamp(28px, 5vw, 64px);
  margin: clamp(12px, 3vw, 26px) 0 0;
  padding: clamp(20px, 3vw, 28px) 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 2.8vw, 32px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--c-gold);
}

.page-about .stat-label {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--t-dim);
}

/* ---------- 章节通用 ---------- */
.page-about .section {
  padding: clamp(64px, 9vw, 128px) 0;
  position: relative;
}

.page-about .about-head {
  display: grid;
  gap: 12px;
  max-width: 74ch;
  margin-bottom: clamp(32px, 5vw, 64px);
}

.page-about .section-num {
  font-family: var(--font-mono);
}

.page-about .about-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 44px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--c-cream);
}

.page-about .about-head__lede {
  margin: 0;
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--t-main);
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-origin__lead {
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-about .about-origin__lead h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 44px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--c-cream);
}

.page-about .about-origin__body p {
  margin: 0 0 18px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--t-main);
}

.page-about .about-origin__body p:last-child {
  margin-bottom: 0;
}

.page-about .about-origin__aside {
  padding-top: 18px;
  border-top: 2px solid var(--c-gold);
}

.page-about .aside-title {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--c-gold-soft);
}

.page-about .aside-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 11px;
}

.page-about .aside-list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--t-main);
}

.page-about .aside-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.74em;
  width: 8px;
  height: 2px;
  background: var(--c-gold);
}

.page-about .aside-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--t-dim);
}

/* ---------- 02 班组 ---------- */
.page-about .about-crews {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(240px, 80%);
  gap: 18px;
  overflow-x: auto;
  padding: 4px 4px 20px;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-crew {
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 26px 22px 24px;
  background: var(--c-mid);
  border: 2px solid var(--line);
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease), border-color 0.28s var(--ease);
}

.page-about .about-crew:hover,
.page-about .about-crew:focus-within {
  transform: translateY(-6px);
  border-color: var(--c-gold);
  box-shadow: var(--shadow-gold);
}

.page-about .crew-mark {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 2px solid var(--c-gold);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--c-gold-soft);
  transition: box-shadow 0.28s var(--ease);
}

.page-about .about-crew:hover .crew-mark {
  box-shadow: 0 0 0 5px rgba(229, 36, 126, 0.16);
}

.page-about .crew-name {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--c-cream);
}

.page-about .crew-line {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--t-dim);
}

.page-about .crew-duties {
  margin: 0;
  padding: 14px 0 0;
  list-style: none;
  display: grid;
  gap: 10px;
  border-top: 1px solid var(--line);
}

.page-about .crew-duties li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.68;
  color: var(--t-main);
}

.page-about .crew-duties li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: 6px;
  height: 6px;
  border: 1px solid var(--c-gold);
  transform: rotate(45deg);
}

.page-about .about-flow {
  margin: clamp(28px, 4vw, 48px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-flow__step {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.72;
  color: var(--t-main);
}

.page-about .flow-mark {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-gold);
}

/* ---------- 03 年份 ---------- */
.page-about .about-timeline__media {
  margin: 0 0 clamp(36px, 5vw, 72px);
}

.page-about .media-frame img {
  display: block;
  max-width: 100%;
}

.page-about .timeline {
  display: grid;
  gap: 24px;
}

.page-about .timeline__axis {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.page-about .axis-link {
  position: relative;
  flex: 0 0 auto;
  padding: 8px 14px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--t-dim);
  text-decoration: none;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-about .axis-link:hover,
.page-about .axis-link:focus-visible {
  color: var(--c-gold);
  border-color: var(--line-strong);
  background: rgba(227, 177, 92, 0.08);
}

.page-about .timeline__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 clamp(28px, 4vw, 44px) 24px;
  border-left: 2px solid var(--line);
  transition: background-color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 5px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--c-deep);
  border: 2px solid var(--c-gold);
}

.page-about .timeline__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .timeline__item:target {
  border-left-color: var(--c-gold);
  background: linear-gradient(90deg, rgba(227, 177, 92, 0.10), rgba(227, 177, 92, 0) 72%);
}

.page-about .timeline__year {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.18em;
  color: var(--c-gold-soft);
}

.page-about .timeline__item h3 {
  margin: 0 0 8px;
  font-size: clamp(18px, 2.1vw, 24px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--c-cream);
}

.page-about .timeline__item p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--t-main);
}

/* ---------- 04 内容线 ---------- */
.page-about .lanes {
  display: grid;
  gap: 20px;
}

.page-about .lane {
  padding: 24px 20px 22px;
  background: var(--c-mid);
  border: 2px solid var(--line);
  transition: border-color 0.28s var(--ease), transform 0.28s var(--ease);
}

.page-about .lane:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
}

.page-about .lane h3 {
  margin: 14px 0 10px;
  font-size: clamp(19px, 2.2vw, 25px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--c-cream);
}

.page-about .lane p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--t-main);
}

.page-about .lane-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--t-dim);
}

.page-about .lane-media {
  margin: 0;
}

/* ---------- 05 伙伴 ---------- */
.page-about .partner-notes {
  display: grid;
  gap: 20px;
}

.page-about .partner-note {
  padding: 26px 22px;
  border-left: 2px solid var(--c-gold);
  background: linear-gradient(180deg, rgba(35, 57, 43, 0.72), rgba(22, 38, 28, 0.28));
}

.page-about .partner-num {
  font-family: var(--font-mono);
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-gold);
}

.page-about .partner-note h3 {
  margin: 12px 0 8px;
  font-size: 19px;
  font-weight: 700;
  color: var(--c-cream);
}

.page-about .partner-note p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--t-main);
}

.page-about .about-partners__media {
  margin: clamp(36px, 5vw, 64px) 0 0;
}

/* ---------- 06 影响 ---------- */
.page-about .reach-grid {
  display: grid;
  gap: 18px;
}

.page-about .reach-card {
  padding: 26px 22px;
  background: var(--c-band);
  border: 1px solid rgba(227, 177, 92, 0.18);
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease);
}

.page-about .reach-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-gold);
}

.page-about .reach-num {
  font-family: var(--font-mono);
  font-size: clamp(34px, 4.4vw, 56px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-gold);
}

.page-about .reach-card h3 {
  margin: 12px 0 8px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-cream);
}

.page-about .reach-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--t-main);
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(229, 36, 126, 0.07), rgba(229, 36, 126, 0) 62%);
}

.page-about .about-next__inner {
  display: grid;
  gap: 14px;
  max-width: 78ch;
  padding-top: clamp(48px, 6vw, 88px);
  padding-bottom: clamp(56px, 7vw, 96px);
}

.page-about .about-next h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.2vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--c-cream);
}

.page-about .about-next p {
  margin: 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--t-main);
}

.page-about .about-next a {
  color: var(--c-gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(227, 177, 92, 0.5);
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .about-next a:hover,
.page-about .about-next a:focus-visible {
  color: var(--c-gold-soft);
  border-color: var(--c-gold-soft);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 760px) {
  .page-about .partner-notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(24px, 4vw, 48px);
  }
}

@media (min-width: 900px) {
  .page-about .about-origin__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: clamp(24px, 3vw, 40px);
    row-gap: 0;
  }

  .page-about .about-origin__lead {
    grid-column: 1 / span 5;
    grid-row: 1 / span 2;
  }

  .page-about .about-origin__body {
    grid-column: 7 / span 6;
    grid-row: 1;
  }

  .page-about .about-origin__aside {
    grid-column: 8 / span 4;
    grid-row: 2;
    margin-top: clamp(32px, 4vw, 56px);
  }

  .page-about .about-crews {
    grid-auto-flow: row;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
    overflow: visible;
    padding: 4px 0 0;
  }

  .page-about .reach-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .reach-card--hero {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
    column-gap: 32px;
    align-items: center;
  }

  .page-about .reach-card--hero .reach-num {
    grid-row: 1 / span 2;
  }

  .page-about .reach-card--hero h3 {
    margin-top: 0;
  }
}

@media (min-width: 960px) {
  .page-about .timeline {
    grid-template-columns: var(--about-axis) minmax(0, 1fr);
    column-gap: clamp(32px, 4vw, 64px);
  }

  .page-about .timeline__axis {
    position: sticky;
    top: calc(var(--header-h) + 40px);
    align-self: start;
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .axis-link {
    border: 0;
    border-left: 1px solid var(--line);
    padding: 10px 0 10px 20px;
    text-align: left;
  }

  .page-about .axis-link::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 50%;
    width: 12px;
    height: 2px;
    background: var(--c-gold);
    transform: translateY(-50%);
    opacity: 0.45;
    transition: opacity 0.24s var(--ease), width 0.24s var(--ease);
  }

  .page-about .axis-link:hover,
  .page-about .axis-link:focus-visible {
    background: none;
  }

  .page-about .axis-link:hover::before,
  .page-about .axis-link:focus-visible::before {
    opacity: 1;
    width: 24px;
  }

  .page-about .lanes {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    column-gap: clamp(22px, 3vw, 36px);
    row-gap: clamp(32px, 4vw, 56px);
  }

  .page-about .lane--one {
    grid-column: 1 / span 5;
    grid-row: 1;
  }

  .page-about .lane-media {
    grid-column: 7 / span 6;
    grid-row: 1;
    margin-top: 56px;
  }

  .page-about .lane--two {
    grid-column: 2 / span 5;
    grid-row: 2;
  }

  .page-about .lane--three {
    grid-column: 8 / span 5;
    grid-row: 2;
  }
}